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Pressure injection demonstrates points of weakness in the posterior nasal arteries

Published online by Cambridge University Press:  20 April 2010

T W Chiu  and
J Shaw Dunn
T W Chiu*
Affiliation:
Plastic and Reconstructive Surgery, Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, China
J Shaw Dunn
Affiliation:
Laboratory of Human Anatomy, University of Glasgow, Scotland, UK
*
Address for correspondence: Mr Tor Wo Chiu, Plastic and Reconstructive Surgery, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, China. Fax: 852 26377974 E-mail: [email protected]
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Abstract

Objective:

To test the hypothesis that potential sites of weakness within normal nasal arteries, when stressed, contribute to the mechanism of epistaxis, we ‘stress-tested’ nasal arteries in unfixed cadaveric heads, using pressure injection of feeding arteries.

Materials and methods:

Indian ink with latex was injected into maxillary arteries under high pressure (620 mmHg). Stepwise dissection was carried out and areas showing ink leakage were examined. Control heads were injected at standard embalming pressures (375 mmHg).

Results:

Ink leakage was found in all heads injected at higher pressure, and was restricted to the nasal mucosa. Histological examination of leakage points demonstrated vessel disruption consistent with dissecting aneurysm formation.

Discussion:

Results showed that high pressure injection caused leakage from arteries in the posterior nose; the distribution of leakage points was consistent with many clinical investigations. The lesions produced were comparable with our best histopathological model of epistaxis, i.e. dissecting aneurysm formation. This suggests that pre-existing weaknesses in the arterial configuration may exist.

Keywords

EpistaxisNasal CavityArteryAnatomy
Type
Main Articles
Information
The Journal of Laryngology & Otology , Volume 124 , Issue 7 , July 2010 , pp. 750 - 752
Copyright
Copyright © JLO (1984) Limited 2010

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